پیش‌بینی آسیب ناشی از ضربه سرعت آهسته بر ورق های کامپوزیتی لایه ای

نویسندگان

گروه مهندسی مکانیک، دانشگاه زنجان، زنجان

چکیده

در این پژوهش، یک مدل المان محدود برای تحلیل ضربه سرعت پایین بر ورق کامپوزیتی ارائه شده است و با استفاده از آن آسیب ایجاد شده ناشی از برخورد یک ضربه‌زننده، با ورق کامپوزیتی لایه‌ای با سرعت پایین، مورد بررسی قرار گرفته است. برای پیش‌بینی آسیب از تئوری پیشنهاد شده توسط چویی- چانگ و همچنین معیار سای- هیل استفاده شده است. برای مدل‌سازی و تحلیل رفتار ورق از تئوری مرتبه اول برشی و تئوری المان محدود ریتز و برای مدل‌سازی تماس از قانون تماس اصلاح‌شده هرتز استفاده شده است. برای حل زمانی معادلات حرکت ورق و ضربه‌زننده از روش انتگرال‌گیری نیومارک استفاده شده است. در قسمت نتایج عددی شرایط مرزی مختلف، ابعاد مختلف و لایه‌گذاری متفاوت مورد بررسی قرار گرفته است و به بررسی آسیب ناشی از ضربه سرعت پایین در ورق کامپوزیتی لایه‌ای پرداخته شده است. پارامتر آسیب و ناحیه آسیب ناشی از ضربه، مورد بررسی قرار گرفته است و اثر پارامترهای مختلف بررسی شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Low Velocity Impact Damage Prediction in Laminated Composite Plates

نویسندگان [English]

  • I. Ahmadi
  • D. Kouhbor
  • R. Taghiloo
چکیده [English]

In this paper, a finite element model is presented for the transient analysis of low velocity impact, and the impact induced damage in the composite plate subjected to low velocity impact is studied. The failure criteria suggested by Choi and Chang and the Tsai-Hill failure criteria are used for the prediction of the damage in the composite plate; then the effect of various parameters on the impact induced damage is investigated. The first order shear deformation plate theory and the Ritz finite element method are employed for modeling the behavior of plate, and the modified Hertz contact low is used for the prediction of the contact force through the impact. In the numerical results, the time history of indentation, contact force and stress during the impact and the impact induced damage is investigated. The matrix cracking and delamination in the plies of the laminated composite plate subjected to low velocity impact are studied and the effects of various parameters are investigated.

کلیدواژه‌ها [English]

  • Impact Damage Prediction
  • Low Velocity Impact
  • Finite element analysis
  • Modified Hertz Contact Law
  • Mindlin Plate Theory
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